The Destructive Force of Tornadoes

Tornadoes are extreme weather phenomena that form from thunderstorms and can cause significant destruction. They are most common in America, especially during spring, with around 1000 reported annually. Tornadoes form when warm moist air meets cool dry air, creating a spinning effect that rises into a tube. Despite extensive research, the full lifecycle of tornadoes remains not fully understood. Tornadoes can cause severe damage, contrary to the belief that they cause little harm.

What atmospheric conditions lead to the development of tornadoes?

Is it true that tornadoes never cause a lot of damage? Explain your answer.